Carbureter.



E. EJE. nouE.

CARBURETER.

APPLICATION FILED JAN-7,191?

m H vb INVENTOR E.E.E.Dou

BY ATTORNEY UNITED sTA Es PATENT OFFICE.

EMILE EUGENE ERNEST DOUE, OF. COLLONGES-SUR-SAGNE, FRANCE.

CARBUIRETER.

fuel by the means of additional air progressively admitted in the feed pipe of the fuel in a quantity increasing as the speed of the motor increases. This automatic emulsion of the fuel does not give'a rigorously constant .charge of' the mixture at every stroke, but-that which is better, gives a more favorable ratio between the weight of the sucked-in air and that of the vaporized fuel.

Figures 1 and 2 show diagrammatic vertical sections of two forms of apparatus for carrying out the new process.

Referring first to Fig. 1, the apparatus comprises a pipe which receives the fuel by a calibrated nozzle 2 in the bottom of the.

fuel tank '3, and then rises to almost the height of'the constant level in the form of a siphon or inverted U, and passes thence down beneath the tank to the spraying noz-- zle 4. The two branches of the siphon go through the bottom of an air chimney 5 which surrounds them, and of which the upper end is open to the air in the upper part of the tank which is open to the atmosphere through the air hole 3. The ascending branch 6 is perforated with holes 7. well calibrated and placed at regular distances along its length. Another nozzle 8 feeds besides the pipe 1 between-the siphon and the spraying nozzle 4. When the engine is at rest, the fuel enters the'pipe 1 by means of the nozzle 2 and by the ports 7 and fills the air chimney 5 to the height of the constant level, closing the ports 7 against the entrance of air. As soon as the engine is started, the suction is exercised on the spraying nozzle 4, which is fed by the nozzle 8 and also by the siphon completely immersed in the the mixture is therefore very rich as is desirable for slow running, with heavy loads, heavy grades and for starting. As soon as the engine increases its speed, the liquid in the air chimney 5 being drawn out, opens one or more, according to the speed,

Specification of Letters Patent.

slows down.

R g t-also be placed in the base of the .dustrial application to which it n.

' Patented Aug. 3, 1915.

' Application filed January 7, 1913. Serial No. 740,612.

of the air ports 7 thereby permitting increasing emulsion of the fuel. As soon as the speed of the engine decreases, the ports 7 for the admission of air are again progresslvely closed by the liquid, thereby more and more enriching the mixture as the en- The nozzle 2 of the Sialr chimney 5; however the suction of the fuel by the siphon Would be in that case less direct at very high speeds, than with the nozzle placed on the bottom of the tank at the end of the siphon.

Another simple and practically built arrangement consists in the substitution of the proper siphon by two concentric pipes (Fig. 2) for which the-best place is in the center of the tank. A vertical suction'pipe 9 open at its upper end and screwed on the channel 10, is surmounted by another closed pipe 11 forming a bell and provided with holes along its length for the admission'of air.

The twoconcentric pipes 9 and 11 are surrounded,-quite close to their base by the air chimney 13 open to the air admitted through air holes 3 and 3 the nozzle 1a of the siphon being placed in the base of the pipe 11 in order to communicate directly with the tank below the air chimney 13.

The shapes, sizes and relative ratios 'of the parts of the described system may be modified in accordance with the various igle adapted without departing from the, invention as claimed.

I claim v 1. In a carbureter, the combination of a tank; a chimney therein open at the top;

and a pipe having a delivery nozzle at one end, and an inlet nozzle commun cating with the tank,a part of said pipe between said nozzles being bent upwardly and forming a siphon in said chimney and provided with openings in the ascending arm.

2. In a carbureter, the combination of a tank; an air chimney open at the top; and a pipe having a delivery nozzle and an inlet nozzle communicating'with the tank, said pipe being provided with a part extending upwardly within said air chimney and provided with openings communicating therewith, said pipe being provided with an additional inlet nozzle communicating'with the tank between said part and the delivery nozzle.

3. In a carbureter for internal combustion motors, the combination of atank; an air -chimney therein, open at the top and having anorifice communicating With the tank; and a pipe provided With a siphon part arranged in said chimney below the normal level of the fuel therein and provided with holes spaced along its length, the fuel serving to obturate said holes during slow running or stoppage I the pipe when the speed'of the motor increases and thesaid orifice feeding the siphon does not supply sufficient fueltp maintain the fuel in the chimney at the height of said normal level, the number of holes engines, the combination of a tank; an air speed of the uncovered varying in accordance With the I motor. l. In a carbureter for internal combustlon chimney therein, open at the top and communicating with the tank and a pipe pro- -vided with two orifices communicating di- ,rectly with the'tank, said pipe being formed into a siphon part within the chimney and between said orifices, the siphon part having holes spaced along its leg, most distant from the outlet of the conduit, said orifice nearest the-outlet serving to supply pure fuel only ,air at high speed'by air entering saidholes at all times/from said tank of which the .quantity diminishes proportionally as the '30 speed increases,'the: orifice most distant from the outlet of the conduit supplying pure fuel at slow speed, this fuel being emulsified with of the motor and to admit air into cation with the fuel container, one of said orifices always supplying fuel of which the quantity diminishes proportionally as the speed of the motor increases, While pure fuel is supplied at the same time by way of the conduit from the other orifice at slow speed of the motor, this fuel being emulsified by air on its passage through the conduit when the speed of the motor increases, by means of a siphon shaped part disposed in a chimney open to the air and provided with holes spaced along its length, the proportion of the air relative to the fuel supply increasing with the speed of the motor, the air thus in-" troducedinto the conduit having the, effect of reducing proportionally the fuel supply by the first orifice.

In testimony whereof I my signature in presence oftwo Witnesses. f

"EMILE EUGENE EaNEs'r Dent.

NVitnesses:

HANSON G. 0mm, VICTOR Warnoos. 

